171 research outputs found
Electromagnetic Catalysis of a Neutrino Radiative decay or One More Source of Information on the Lepton Mixing Angles?
The radiative decay of ultrarelativistic massive neutrino is investigated in electromagnetic fields in the framework of the
Standard Model with lepton mixing. Estimates of the decay probability and
``decay cross-section'' for accelerator neutrinos of high energies in the
electric field of nucleus permit one to discuss the general possibility of
carrying out the neutrino experiment. Such an experiment could give unique
information on mixing angles in the lepton sector of the Standard Model which
would be almost independent of the specific neutrino masses.Comment: 6 pages, LaTeX, Talk given by L.A.Vassilevskaya at the XXXth
Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les
Arcs, Savoie, France, March 11-18, 199
High-energy neutrino conversion into electron-W pair in magnetic field and its contribution to neutrino absorption
We calculate the conversion rate of high-energy neutrinos propagating in
constant magnetic field into an electron-W pair (nu -> W + e) from the
imaginary part of the neutrino self-energy. Using the exact propagators in
constant magnetic field, the neutrino self-energy has been calculated to all
order in the field within the Weinberg-Salam model. We obtain a compact formula
in the limit of B << Bcr = m^2/e. We find that above the process threshold Eth
\~ 2.2 10^16 (Bcr / B) eV this contribution to the absorption of neutrinos
yields an asymptotic absorption length ~ 1.1 (Bcr / B)^2 (10^{16} eV / E)
meters.Comment: 10 pages in RevTeX, 2 figures; published version: two typos
corrected, one reference adde
Rare Electroweak Processes and and Heavy Top Quark
A brief overview of the recent measurements of the branching ratio of the
rare decay in the context of their agreement with the
Standard Model (SM) is given. It is shown that KEK result well correlates with
the SM and B-physics, whereas the BNL results are in conflict with the SM with
the heavy top quark.Comment: (talk given at the 5th Conference on the Intersections of Particle
and Nuclear Physics, St. Petersburg, Florida, USA, May 31-June 6, 1994), 6
pages, LaTeX, Yaroslavl, Yaroslavl State University preprint YARU-HE-94/0
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